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ASTM A312 253MA / UNS S30815 / EN 1.4835 Stainless Steel Seamless Pipe Pickling

ASTM A312 253MA / UNS S30815 / EN 1.4835 Stainless Steel Seamless Pipe Pickling

  • ASTM A312 253MA / UNS S30815 / EN 1.4835 Stainless Steel Seamless Pipe Pickling
  • ASTM A312 253MA / UNS S30815 / EN 1.4835 Stainless Steel Seamless Pipe Pickling
  • ASTM A312 253MA / UNS S30815 / EN 1.4835 Stainless Steel Seamless Pipe Pickling
  • ASTM A312 253MA / UNS S30815 / EN 1.4835 Stainless Steel Seamless Pipe Pickling
ASTM A312 253MA / UNS S30815 / EN 1.4835 Stainless Steel Seamless Pipe Pickling
Product Details:
Place of Origin: CHINA
Brand Name: YUHONG
Certification: ABS, LR, GL, DNV, NK, TS, PED, AD2000, GOST9941-81, CCS, ISO 9001-2008
Model Number: ASTM A312 253 MA Stainless Steel Seamless Pipe
Payment & Shipping Terms:
Minimum Order Quantity: 500KGS
Packaging Details: Ply-wooden Case /Iron Case/ Bundle with plastic Cap
Delivery Time: 7 DAYS
Payment Terms: L/C, T/T
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Detailed Product Description
Product Name: Stainless Steel Seamless Pipe Standard: ASTM A312 / ASME SA312
Material: TP304/304L/304H/316L/309S/310S/316L/316H/317H/321/253MA, Etc. O.D.: 1/2''to 48''
W.T.: SCH 5S To SCH XXS Length: Fixed Length, Random Length
End: Plain Ends / Beveled Ends Type: Seamless / Welded
Surface: Pickled And Annealed
Highlight:

ASTM A312 stainless steel seamless pipe

,

253MA stainless steel pipe

,

UNS S30815 seamless pipe

ASTM A312 253MA / UNS S30815 / EN 1.4835 Stainless Steel Seamless Pipe

 

 

253MA is a heat-resistant austenitic stainless steel alloy. It contains chromium, nickel, and nitrogen as its main alloying elements. This alloy offers excellent oxidation resistance at high temperatures up to 1150°C, making it suitable for use in high-temperature applications such as furnace components, heat exchangers, and exhaust systems. They are commonly used in industries such as chemical processing, power generation, and oil and gas exploration. It is designed to fill the gap between standard 304/316 stainless steels and more expensive high-alloy steels and nickel-based alloys.

 

 

Equivalent Grades of ASTM A312 253MA Stainless Steel Seamless Pipe Pickling

Grade UNS WERKSTOFF NR. EN SS
253MA(UNS S30815) S30815 1.4835 X9CrNiSiNCe21-11-2 2368

 

 

Chemical Composition of Stainless Steel Seamless Pipe Pickling

Grade

C

max

Si

max

Mn

max

P

max

S

max

 Cr Ni Mo N
UNS S30815 0.05~0.10 1.4~2.0 0.80 0.030 0.030 20.0-22.0 10.0-12.0 / 0.14-0.20

 

 

Physical properties of ASTM A312 253MA Stainless Steel Seamless Pipe Pickling

Density (kg/m3) Elastic Modulus (GPa) Mean Coefficient of Thermal Expansion (mm/m/°C) Thermal Conductivity (W/m.K) Specific Heat Electrical Resistivity (nW.m)
0-100°C 0-600°C 0-1000°C at 20°C at 1000°C 0-100°C (J/kg.K)
7800 200 17 18.5 19.5 15 29 500 850

 

 

Mechanical Properties of ASTM A312 253MA Stainless Steel Seamless Pipe Pickling

Tensile Str (MPa) min Yield Str 0.2% Proof (MPa) min Elongation (% in 50mm) min Hardness
Rockwell B (HR B) max Brinell (HB) max
600 310 40 95 217

 

 

What is "Pickling" and Why is it Important?
  • Process:

​          Pickling involves immersing the stainless steel pipe in a bath of mixed acids, typically Hydrofluoric (HF) and Nitric (HNO₃) acids.

  • Purpose:
  1. Removes Scale: During hot-forming (e.g., extrusion or annealing heat treatment), a heavy, dark oxide layer (scale) forms on the pipe's surface.
  2. Removes Contamination: It dissolves embedded iron particles ("free iron") from tools or handling that can compromise the passive layer and lead to rust staining.
  3. Restores Passive Layer: The process dissolves a thin layer of the base metal, which then instantly reacts with oxygen in the air to form a new, continuous, and protective chromium oxide passive layer on the surface.
  • Result: A clean, uniform, matte silver-gray surface that is fully corrosion-resistant and ready for service. A pickled surface is a critical quality indicator for high-performance stainless steel.

 

 

Apllications

Chemical

Pharmaceutical & Bio-Medical

Petrochemical & Refinery

Environmental

Food Processing

Chemical Fertilizer

Sewage Disposal

Desalination

Waste Incineration etc.

 

 

ASTM A312 253MA / UNS S30815 / EN 1.4835 Stainless Steel Seamless Pipe Pickling 0

Tag:

seamless stainless steel tube,

seamless boiler tubes,

stainless steel seamless pipes

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